7 a.m. to 7:45 a.m.Sunrise service with the band Switchfoot on the FanZone main stage.

8:45 a.m. to 9:45 a.m.Kevin Ortiz performs on the FanZone main stage.

10:15 a.m. to 11:15 a.m.Switchfoot performs pre-race concert on the FanZone main stage.

11:50 a.m.NSCS driver introductions – Security clears pit road.

12:30 p.m.Auto Club 400 NSCS race (200 laps, 400 miles).

FONTANA – It’s been one year since Brian Vickers had to announce he was stepping away from the NASCAR Sprint Cup Series for a second time after a recurrence of blood clots.

This weekend marks the third time since his announcement in 2015 that Vickers, 33, will take the wheel in a Sprint Cup car, subbing for Tony Stewart, who has missed the start of the 2016 race season because of a back injury.

Vickers will race in Sunday’s Auto Club 400 after qualifying 24th. Despite not getting a lot of seat time because of his ongoing condition, Vickers knows how fortunate he is to have a path to a healthy future.

“I've grown a lot as a person and a lot of good things have come from it,” said Vickers, who appears in television ads with Arnold Palmer, actor Kevin Nealon, and NBA star Chris Bosh. “I was lucky to win my battle with blood clots, many people are not.”

Vickers‘ ride Sunday is being sponsored by pharmaceutical Janssen and Arnie's Army Charitable Foundation to bring awareness about the condition to Southern California and beyond.

Friday, Vickers talked of his journey to better understanding his health issue and how widespread it is.

“When it first happened to me I had so many people, fans and crew members ... that came up to me and said they have had or do have blood clots. It's interesting that story keeps coming to me.”

After being away a year, Vickers wasn't sure when he'd sit in another race car until Tony Stewart gave him an opportunity to substitute for him.

Stewart had been injured in an offseason, off-road accident and was going to miss the start of 2016 season. Vickers, who filled in for Stewart at the Daytona 500 and two weeks ago in Las Vegas, will drive Stewart's No. 14 Chevrolet on Sunday.

And, he’ll get yet another opportunity to help raise awareness for a pretty common condition that is often misdiagnosed and not talked about much.

Saturday, the Xfinity Series 300 race, which was named for the cause treatmyclot.com, came down to gas and tire issues as Auto Club 400 pole sitter Austin Dillon avoided competitors down the home stretch to claim his seventh Xfinity Series win.

With three career Sprint Cup victories, Vickers last won at New Hampshire in 2013.

In 2010, Vickers had an artificial patch inserted to fix a hole in his heart. Then in 2014 Vickers underwent another surgery to combat his body rejecting the patch.

When Vickers was first diagnosed with blood clots shortly after his procedures, he said it took some time to wrap his mind around the issue. Then, it took some time to realize what his doctor was telling him.

His doctor said blood clots are underdiagnosed and until they better understand what was causing the issue they couldn't find out how to deal with it.

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